Testing apparatus



Feb. 8 1927.

F. MCDONALD, JR., ET AL Filed 'June 1924 TESTING APPARATUS 5 Sheets-heet 1 WITNESS:

Fran/r Mflonaldflr. James WFrilick ATTORNEY INVENTOR S Feb.- 8, 1927.

F. MCDONALD, 'JRI, ET AL TESTING APPARATUS Filed June 1 1924 3 Sheets-Sheetz WITNESS:

Fmnk z isamaz ,.5 James Fril ick INVENTORS ATTORNEY I L Yw ZM- Feb. 8, 1927. 1,617,214

F. MCDONALD,'JR.. .ET AL TESTING APPARATUS Filed June 18, 1924 s Sheets-Sheets Frdnlr Mponauwn James WFrlick Y ATTORNEY Patented F eb. 8, 1927.

UNITED STATES, PATENT OFFICE.

FRANK MGDONALD, JR AND JAMES W. FRILICK, 0F MERIDIAN, MISSISSJ IPPL TESTING APPARATUS.

Application filed June 18, 1924. Serial No. 720,845.

This invention relates to a method and apparatus of testing the tensile strength of composition roofing, the general object of the invention being to provide means for holding strips of roofing in stretched condition and applying weight to the same.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail,reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is an elevation showing how the invention is carried out.

Figure 2 is a plan view showing the sheets ready to receive the weight.

Figure 3 is a view of one end of one of the supporting rollers.

Figure 4 is a detail sectional view show ing how the roller is connected with the spacing rod.

Figure 5 is a perspective view of one of the supporting means for the weight.

Figure 6 is a plan view of Figure 4.

' I As shown in these views, we take two strips A of the material to be. tested and roll their ends upon the rollers 1. The roll? ers are then held in spaced relation and against rotary movement by placing them in engagement with the spacing bars 2, these bars having their ends engaging the notches 3 formed in the rollers and the parts are held together by means of thebands t which are fastened to the rollers and to the bars 2. The rollers are then placed upontrestles 5 and cross pieces 6 are placed on the strips -A,.adjacent the rollers, and each cross piece is provided with a block 7'adj aoent each end thereof so that the block will be located over a strip A, as shown in Figure 2. The upper faces of the blocks are rounded so as to form a seat for the wheels of an automobile, such as shown at B in Figure 1, which is used as V a weight for testing the strength of the 1 sheets In order to facilitate the placing of the automobile on the strips we provide two sets of drumsS, each set being arranged upon a shaft9 which is supported by the hangers 10. A cableill is-fastened to each drum and each cable has a clip 12 at its low er end for engaging a hub of the automobile.

The shafts 9 can be rotated in any desired manner to Wind and unwind the cables on the drums so as to raise and. lower the automobile.

From the above it will be seen that after the parts are assembled and placed on trestles under the automobile, which is held in raised position by the lifting and lowering means, the automobile is lowered until its wheels rest upon the blocks 7 so that its weight is carried by the strips A of the material to be tested. If the strips do not break under the weight of the automobile, it

willbe known that the tensile strength of the strips is greater than that of the weight of the automobile. Weight-s can be placed in the machine to increase its weight and different sizes of automobiles can be used. It will of coursev be understood that other bodies can be used in place of the automobile. It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

We desire it tobe understood that we may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall with in the scope of the appended'claii'n.

What we claim is v A device of the class described comprising a pair of rollers adapted to have connected therewith the ends of apair of strips of the material to be tested, said rollers having notches therein, a pair of spacing bars hav ing their ends engaging the notches, means for detachably connect-ing the ends of the ing curved faces carried by the cross pieces In testimony whereof we aflix our signatures.

FRANK MCDONALD, JR. JAMES w. FRILICK. 

